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Per §4.12, superplasticizers can typically reduce the water content of a concrete mix by as much as:

AAbout 25 percent
BAbout 15 percent
CAbout 5 percent
DAbout 60 percent
Answer & Solution
Correct answer: A. About 25 percent
1. §4.12 reads: 'Superplasticizers… capable of reducing water content by as much as 25 percent.' 2. The result, at constant workability, is a 70-80 percent rise in strength; cement savings of 25-30 percent are possible. _Source: IGNOU ET-522 Block-1 Unit-4 Admixtures, §4.12, p. 53_
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